| 摘要 |
PROBLEM TO BE SOLVED: To obtain the subject resin, having specific viscosity characteristics, capable of continuously coating a metal without causing the resin breakage and good in heat and chemical resistances, strength and electrical characteristics by polymerizing an alkali metallic sulfide with a dihaloaromatic compound in the presence of trihaloaromatic compounds. SOLUTION: The polymerizing reaction of an alkali metallic sulfide (e.g. hydrous sodium sulfide) and a dihaloaromatic compound (e.g. p-dichlorobenzene) is carried out in the presence of a trihaloaromatic compound (e.g. 1,2,4- trichlorobenzene) in a solvent such as N-methylpyrrolidone at 220 deg.C temperature in a nitrogen atmosphere for 5hr to thereby afford the objective resin, having 50-3000Pa.s melt viscosity η200 measured at 310 deg.C and 200/sec shear rate and the ratio R (η200 /η200 ) of the melt viscosity η200 to the melt viscosity η1200 measured at 310 deg.C and 1200/sec shear rate satisfying the formula. The resin is capable of stably and continuously coating a metal without causing resin breakage and without cracking a coating layer due to heat treatment and has high heat, olefin and chemical resistances, flame retardance, low-temperature physical properties, electrical insulating properties and strength. |
